In this "In Focus," we take you down the seedy back alleys of film noir and introduce you to the femmes fatales, the two-bit losers, and the world-weary detectives--as well as the cinematographers and directors--that make film noir one of the most dynamic forms of film. Try the links below as we examine 10 of the greatest noirs. Plus! Alain Silver examines the ending of film noir classic Kiss Me Deadly.